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Earth Topics (Applications)
Instrument type
  • WS
  • Mission
    Date of Launch:
    ERS-1 - 17 July 1991
    ERS-2 - 21 April 1995
    Mission Status:
    ERS-1 ended on March 2000 and ERS-2 September 2011 
    Orbit Height:
    782 to 785 km
    Orbit type:
    Near-circular, polar, Sun-synchronous
    Swath Width:
    5 km
    SCATTEROMETER Nominal Resolution back-scattering measurements, Ocean Wind field
    (1544) recent views
    Last update: 12 June 2019

    The ERS data reprocessed with the ASPS facility is also available in the UWI format to maintain the compatibility with the FD (Fast Delivery) products.

    The ASPS UWI product is organised in frames of 500 x 500 km providing the radar backscattering sigma nought for the three beams of the instrument plus the wind speed and direction.

    The wind retrieval is performed with the CMOD5N geophysical model function derived by ECMWF to compute the neutral winds rather than 10m winds.

    ASPS UWI products are provided with a spatial resolution of 50x50km and a grid spacing of 25 km. One product covers one orbit from ascending node crossing.

    Please consult the Product Quality Readme file before using the ERS ASPS data.

    Data Set Specifications
    Spatial coverage: 82 N, 82 S, 180 W, 180 E
    Temporal coverage: 1991-08-01 - 2011-07-04
    Current Processor Version: ASPS 10.04
    Processing level
    Level 2
    How to access this data

    The data is distributed in UWI format via FTP upon registration.

    Reprocessed Data:

    ERS-1 data is available from 1 August 1991 to 2 June 1996.

    ERS-2 data is available from 26 March 1996 to 4 July 2011.

    See WS products table and related news of 13 June 2019.

    Terms & Conditions applicable
    Utilisation of this data is subject to ESA's Earth Observation Terms and Conditions


    Documentation related to SCATTEROMETER data


    Scatterometer Quality Information


    All Scatterometer documents